Non-primary embedded database schema not being initiliazed - spring

Question

I'm currently working on a Spring Boot (1.5.10.RELEASE) application that uses 2 embedded databases. This two databases are defined equally but one's defined on the application itself and one's defined on a custom autoconfiguration class that's on an imported JAR; yet only the one flagged as #Primary (the one on the application) gets the schema initialized.
This is the current definition for both datasources:
Primary, on the application:
#Configuration
public class DataSourceConfiguration {
#Bean
#ConfigurationProperties(prefix = "first.datasource")
#Primary
public DataSourceProperties firstProperties() {
return new DataSourceProperties();
}
#Bean
#Primary
public DataSource firstDataSource() {
return firstProperties().initializeDataSourceBuilder().build();
}
#Bean
#Primary
public JdbcTemplate firstTemplate() {
return new JdbcTemplate(firstDataSource());
}
}
On the autoconfiguration:
#Configuration
#ConditionalOnProperty(name = "second.datasource.url")
public class SecondDataSourceAutoconfiguration {
#Bean
#ConfigurationProperties(prefix = "second.datasource")
public DataSourceProperties secondProperties() {
return new DataSourceProperties();
}
#Bean
public DataSource secondDataSource() {
return secondProperties().initializeDataSourceBuilder().build();
}
#Bean
public JdbcTemplate secondJdbcTemplate(#Qualifier("secondDataSource") DataSource datasource) {
return new JdbcTemplate(datasource);
}
}
And my application.yml fills the properties:
first:
datasource:
url: jdbc:h2:firstdb;DB_CLOSE_ON_EXIT=FALSE
second:
datasource:
url: jdbc:h2:seconddb
platform: h2
My resources folder contains both a schema.sql that's executed on firstdb and a schema-h2.sql which should get executed on seconddb but does not. I tried playing around with the datasource.schema and datasource.initialize properties, switching the script names and the platform property to the first datasource (in that case, the schema-h2.sql gets executed on firstdb, but nothing on the seconddb) and changing the embedded database provider to HSQLDB; but can't get the schema for the non-primary in-memory DB initialized anyhow.